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impl Transform (2 dimensional) for Matrix3

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This commit is contained in:
Mark Hintz 2016-04-27 23:55:47 +02:00
parent a3539483b6
commit 0a78173e2b
1 changed files with 30 additions and 1 deletions
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31
src/matrix.rs
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@ -26,7 +26,7 @@ use angle::Rad;
use approx::ApproxEq;
use euler::Euler;
use num::BaseFloat;
use point::Point3;
use point::{Point2, Point3};
use quaternion::Quaternion;
use transform::{Transform, Transform2, Transform3};
use vector::{Vector2, Vector3, Vector4};
@ -756,6 +756,33 @@ impl<S: BaseFloat> ApproxEq for Matrix4<S> {
}
}
impl<S: BaseFloat> Transform<Point2<S>> for Matrix3<S> {
fn one() -> Matrix3<S> {
One::one()
}
fn look_at(eye: Point2<S>, center: Point2<S>, up: Vector2<S>) -> Matrix3<S> {
let dir = center - eye;
Matrix3::from(Matrix2::look_at(dir, up))
}
fn transform_vector(&self, vec: Vector2<S>) -> Vector2<S> {
(self * vec.extend(S::zero())).truncate()
}
fn transform_point(&self, point: Point2<S>) -> Point2<S> {
Point2::from_vec((self * Point3::new(point.x, point.y, S::one()).to_vec()).truncate())
}
fn concat(&self, other: &Matrix3<S>) -> Matrix3<S> {
self * other
}
fn invert(&self) -> Option<Matrix3<S>> {
SquareMatrix::invert(self)
}
}
impl<S: BaseFloat> Transform<Point3<S>> for Matrix3<S> {
fn one() -> Matrix3<S> {
One::one()
@ -809,6 +836,8 @@ impl<S: BaseFloat> Transform<Point3<S>> for Matrix4<S> {
}
}
impl<S: BaseFloat> Transform2<S> for Matrix3<S> {}
impl<S: BaseFloat> Transform3<S> for Matrix3<S> {}
impl<S: BaseFloat> Transform3<S> for Matrix4<S> {}